Factor completely
2. 4x² – 9
[2 pts]

(2x+3) (2x-3)

Step-by-step explanation:

Both 4 and 9 have square roots and the problem is a difference of two squares. So if factored, one parenthesis will have a - and the other will have a +.

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47